—Reputation mechanisms are essential for online transactions, where the parties have little prior experience with one another. This is especially true when transactions result in...
Unobtrusive and multiple-sensor interfaces enable observation of natural human behavior in smart environments. Being able to detect, analyze and interpret this activity allows for...
We present Asirra (Figure 1), a CAPTCHA that asks users to identify cats out of a set of 12 photographs of both cats and dogs. Asirra is easy for users; user studies indicate it c...
Jeremy Elson, John R. Douceur, Jon Howell, Jared S...
As technologies evolve and computer systems shrink to the size of matchboxes, also their field of application shifts in new directions. Our permanent companions, mobile phones, p...
Christian Bertelsmeyer, Erik Koch, Alexander H. Sc...
The goal of the Argo system is to allow medium-sized groups of users to collaborate remotely from their desktops in a way that approaches as closely as possible the effectiveness ...
Hania Gajewska, James J. Kistler, Mark S. Manasse,...